PATHOLOGICAL RESULTS, ETC. 343 



posterior mediastinal and the bronchial glands, while one 

 epididymis showed a tuberculous nodule. The channel of 

 infection here was, therefore, through the upper intestinal 

 tract into the cceliac glands, and thence to the posterior 

 mediastinal and bronchial glands, while the interest of the 

 result depends on the fact that a part of the body (that is 

 the epididymis) far removed from the seat of infection 

 became tuberculous. While, therefore, as in the other 

 cases, the part first affected was the lymphatic glands, the 

 affection of the epididymis can only be ascribed to a convey- 

 ance by the blood stream of the tubercular virus. 



The results obtained by feeding calves with tuberculous 

 material illustrate some of the important points in the dis- 

 tribution of tuberculous lesions which occur in the human 

 beinor. I n the calf and cow the intestinal lesion which 

 results from feeding with tuberculous material frequently 

 does not ulcerate, caseous nodules being formed in the 

 Peyer's patches, which may undergo calcification, or may 

 even heal. This was several times observed in natural 

 tuberculosis in the cow. Ulceration may also take place. 

 Four calves were fed with one kilogram of bovine tubercu- 

 lous material, namely, minced lung, lymphatic gland and 

 udder, all extensively diseased. The calves fed out of the 

 same trough and were kept in the same shed. The first 

 calf was killed in twenty-eight days and showed 1 16 caseous 

 nodules in the Peyer's patches of the small intestine, and 

 affection of the corresponding mesenteric glands, but of no 

 other onjan or o-land in the abdomen. In the thorax, the 

 bronchial glands were affected, and there were a few scat- 

 tered tubercles in the lung tissue near the surface. Here, 

 then, the seat of the infection was the small intestine, from 

 which the mesenteric glands were affected, and subsequently 

 the. bronchial glands, the intervening lymphatic glands being 

 skipped by the disease. 



The second calf was killed in sixty-one days. Sixteen 

 nodules of tubercle were found in the intestine; a few of the 

 mesenteric glands were tuberculous, and, as in the other 

 calf, the remaining abdominal glands were skipped, and the 

 posterior mediastinal glands were affected, the bronchial 



